[heap] Remove obsolete constructors from SemiSpaceIterator.

src/heap/spaces.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/heap/mark-compact.h"
@@ skipping 1828 matching lines @@
       page = page->next_page();
       CHECK_NE(page, space->anchor());
     }
   }
 }
 #endif
 
 
 // -----------------------------------------------------------------------------
 // SemiSpaceIterator implementation.
+
 SemiSpaceIterator::SemiSpaceIterator(NewSpace* space) {
   Initialize(space->bottom(), space->top());
 }
 
 
-SemiSpaceIterator::SemiSpaceIterator(NewSpace* space, Address start) {
-  Initialize(start, space->top());
-}
-
-
-SemiSpaceIterator::SemiSpaceIterator(Address from, Address to) {
-  Initialize(from, to);
-}
-
-
 void SemiSpaceIterator::Initialize(Address start, Address end) {
   SemiSpace::AssertValidRange(start, end);
   current_ = start;
   limit_ = end;
 }
 
 
 #ifdef DEBUG
 // heap_histograms is shared, always clear it before using it.
 static void ClearHistograms(Isolate* isolate) {
@@ skipping 1249 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8